/*
 * Copyright 2021 Huawei Technologies Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package data

import (
	"sync"
)

type AdapterData struct {
	Subscriptions map[string]*Store
	MqttClients   map[string]*MqttConn
	DbConns       map[string]*TDEngine
}

var once sync.Once

var data *AdapterData

func GetDataInstance() *AdapterData {
	once.Do(func() {
		data = &AdapterData{}
	})
	return data
}
